MistleGO! mistletoe survey – ensure your orchard is recorded!

A brand new mistletoe survey has just been launched by the Tree Council and Oxford University, as an app-based citizen science project to assess the state of mistletoe in Britain. Not just where is it, but what quantities exist. This is new, and exciting, as it will help determine what is happening with mistletoe in Britain here – it seems to be spreading more and faster and we need a new study to assess this, and to create a baseline for assessments in future.

Orchard owners across Gloucestershire – and in adjoining Somerset, Worcestershire, Herefordshire and Gwent – will be familiar with the particular problem locally. Neglected traditional orchards, in the heart of mistletoe’s favoured region, can become overwhelmed by mistletoe – and it can result in the death of tress and accelerate orchard loss. It shouldn’t be like this of course – mistletoe has co-existed in our area and our orchards since at least the early 19th century and probably well before that. But the decline in interest in managing such orchards, coupled with an apparent increase in mistletoe spread, is now a problem.

Which we need to document. Many will recall the National Mistletoe Survey in the 1990s, run jointly by the Botanical Society of Britain and Ireland and Plantlife, the plant conservation charity. Instigated in 1992 and analysed through the 1990s up to 1999. That was led by GOT’s own Jonathan Briggs, who is an advisor on the new project  The 1990s study, also linked to orchards  but worrying that orchard loss might result in mistletoe loss (a concept that now seems naive!) merely assessed where mistletoe was growing. But not the amount growing The new project aims to address that.  There is a presentation all about it here: https://youtu.be/o6IcGgkcTGk

The assessment is not just about orchards of course – and the new project looks well beyond orchards to the wider habitats where mistletoe thrives. Anecdotal evidence, and some detailed regional local studies outside our area since the 1990s study, have suggested mistletoe is doing very well in all its habitats – orchards, parkland, churchyards, hedgerows etc. Increasing spread may be due to climate change, changes in the bird populations spreading the seeds, or something else entirely. For a discussion of all this have a read of Jonathan Briggs’ 2021 review here.

Ollie Spacey and mistletoe

So… do take part if you can. It is important that we document the abundance of mistletoe in our area!  And the new study does allow you to record multiple hosts trees at once, so no need (phew!) to document every individual orchard tree!

The project is called MistleGO! It is app-based (though you can use the website version if you prefer) and is being masterminded by Oliver Spacey, a PhD student at Oxford.  The app requires you to give location (it will do this automatically), to take a picture of the tree (or group of trees) with mistletoe, give a score of how much mistletoe there is, and, optionally, give additional information on host tree species etc. Full details (summarised below) are on the Tree Council website here and download instructions for the app (you need the Arc123 app first, and then run the MistleGO! app within that)  are here.

Or just scan this QR code.

 

How to take part:

Download the Survey123 app from the App Store or Google Play (or, if on a PC, from Microsoft)

Download the MistleGO! survey via the link above or the QR code

Open the app and click “Continue without signing in”

Click on the MistleGO! survey and start collecting your record!

You can also take part and upload pictures you’ve taken via the web version, but make sure to set your location to where you spotted the mistletoe!